TYPO3

Apache Solr can be used in master/slave mode using build in replication. Normally, you use a dedicated server as a master and another server as a slave. Since indexing many documents can take some time, there might be another reason for indexing besides load balancing, namely having a core for searching (which might be outdated) while indexing into another core which will be incomplete during the indexing process.

Although TYPO3 ships with a login form within the fe_login extension, it sometimes might be necessary to implement your own login. This article explains how to do this with Extbase and salted passwords activated.

pt_extlist ships quite a few filters out-of-the-box like string filter, select filter, date picker and so on. For more complex situations you can either implement your own filter class or simply combine some out-of-the-box filters within your template to come up with more complex filters. This tutorial explains how to do this.